package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    DishMapper dishMapper;
    @Autowired
    DishFlavorMapper dishFlavorMapper;
    @Autowired
    SetmealDishMapper setmealDishMapper;

    @Override
    /**
     * 插入菜品
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        //把dishDTO的数据拷贝进数据库
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);
        //拿到菜品的id
        Long dishId = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     *
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult page(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 批量删除菜品
     *
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断菜品是否在启售
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            //当前菜品正在售卖中不能删除
            if (dish.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }
        //判断菜品是否被套餐关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds != null && setmealIds.size() > 0) {
            //当前菜品被套餐关联
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }

        for (Long id : ids) {
            //删除菜品
            dishMapper.deleteById(id);
            //删除菜品相关的口味
            dishFlavorMapper.deleteByDishId(id);

        }
    }

    /**
     * 根据id查询菜品,回显数据
     *
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //查询菜品
        Dish dish = dishMapper.getById(id);
        //根据菜品id查询对应的口味
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        DishVO dishVO = DishVO.builder()
                .flavors(dishFlavors)
                .build();
        BeanUtils.copyProperties(dish, dishVO);
        return dishVO;
    }

    /**
     * 修改菜品
     */
    @Override
    @Transactional
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //修改菜品数据
        dishMapper.update(dish);
        //先删除原有口味的数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //重新插入口味数据
        List<DishFlavor> flavors1 = dishDTO.getFlavors();//拿到口味数据
        if (flavors1 != null && flavors1.size() > 0) {
            flavors1.forEach(dishFlavor1 -> {
                dishFlavor1.setDishId(dishDTO.getId());
            });
            //向口味表中插入多条数据
            dishFlavorMapper.insertBatch(flavors1);
        }
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> selectByCategoryId(Integer categoryId) {
        List<Dish> dishList=dishMapper.selectByCategoryId(categoryId);
        return dishList;
    }

    /**
     * 启用禁用菜品
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
       Dish dish=Dish.builder()
               .id(id)
               .status(status)
               .build();
       dishMapper.update(dish);
    }
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {

        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

}
